Progress in iron bioavailability and assessment method of plant-source food Several problems in ecological security assessment research Research on the methods of urban ecological environmental quality assessment The research progress and prospect of watershed ecological risk assessment Research progress on the effects of land consolidation on ecosystem services Present Situation and Prospect of Forest Ecosystem Health Assessment Offshore ecosystem health status assessment: A review. Comprehensive quantitative assessment models for ecological environment in arid area Land carrying capacity spatiotemporal differentiation in the Bohai Sea Coastal Areas Review of carbon sequestration assessment method in the marine ecosystem Functions and assessment methods of protecting soil fertility of agro-forestry ecosystems Research progress in ecological risk assessment of mining area A literature review on evaluation of agricultural ecosystem services The comprehensive assessment method on the ecological environment in the coal mining areas Assessment indicators system of forest ecosystem health based on the disturbance in Wangqing forestry Construction of evaluation index system for groundwater ecosystem health assessment Calculation System Construction of Grassland Ecological Service Value